CVE-2021-21206
Google Chromium Blink Use-After-Free Vulnerability
Published Apr 26, 2021 · updated Jun 16, 2026 · google chrome
Google Chromium Blink contains a use-after-free vulnerability that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.
Timeline
Detection, updates, and resolution for this record.
Apr 26, 2021 · Catalog
Detected
Google Chromium Blink contains a use-after-free vulnerability that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.
Nov 3, 2021 · CISA KEV
Known exploited
Apply updates per vendor instructions.
Nov 17, 2021 · CISA KEV
Remediation due
Apply updates per vendor instructions.
Jun 16, 2026 · Catalog
Updated
Google Chromium Blink contains a use-after-free vulnerability that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.
Required action
Apply updates per vendor instructions.
CISA due date Nov 17, 2021
Affected
- cpe fedoraproject/fedora32
- cpe fedoraproject/fedora33
- cpe fedoraproject/fedora34
- cpe google/chromeversion unspecified
- vendor Google Chromium Blinkversion unspecified
Sources
- CISA KEVCVE-2021-21206
Google Chromium Blink contains a use-after-free vulnerability that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.
cisa.gov - CVE.orgCVE-2021-21206
Official CVE identifier
cve.org - FIRST EPSSCVE-2021-21206
30-day exploitation probability 9.3%
first.org - NIST NVDCVE-2021-21206
Use after free in Blink in Google Chrome prior to 89.0.4389.128 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
nvd.nist.gov